package com.geaosu.wanandroid.kotlin.learn

fun main() {
//    val s = Test025_Students()
//    doSomeThing(s)


}


fun doSomeThing(str: String?) {
    if (str != null) {
        val length = str.length
        val toUpperCase = str.toUpperCase()
    }
}

fun doSomeThing(s: Test025_Students) {
    s.readBooks()
    s.doHomeWorld()
}

